HP Gas

High-Purity FC-218 (Octafluoropropane)

Properties and Classification

Appearance: Colorless and odorless gas UN Number: 2424
CAS Number: 76-19-7 Liquefied gas

* Refer to MSDS for detailed information on the properties and safety of the product.


Purity vol% Min. 99.95
Air volppm Max. 100
H2O volppm Max. 30
Acids as HF volppm Max. 0.3
Other fluorocarbons volppm Max. 500
Clean Gas HFC-23 (Clean Gas Trifluoromethane)


Item 10L cylinder 47L cylinder
Size Inside diameter 140mm 232mm
Height (to the neck portion) 850mm 1370mm
Height (with a protective cap) * 1000mm 1520mm
Valve nozzle height (center) * 875mm 1380mm
Loading weight 8kg 40kg
Material Manganese steel

* Estimated values for when a standard valve is mounted on a standard cylinder. The accuracy of these values is not guaranteed.


Nozzle size Ø22 mm X 14 right-hand threads
Material BRASS

Physical & Chemical Properties

Item Unit Data
Chemical formula C3F8
Molecular weight 188.02
Boiling point °C -36.7
°F -34.1
Melting point °C -183.0
Specific gravity (air: 1) 6.5
Liquid density (20°C, saturated liquid) kg/L 1.350
Gas density g/L
Critical temperature °C 71.9
Critical pressure MPa 2.68
kg/cm2 27.3
Flammability °C Not applicable
Toxicity Not applicable
Latent heat of vaporization (0°C, 1013MPa) kJ/kg
Maximum permissible concentration (ACGIH) ppm
Explosive limit (in air) vol%

Temperature – Vapor Pressure Curve

Clean Gas FC-C318 (Clean Gas Octafluorocyclobutane)